Graco A Series Instructions-Parts List Manual
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Graco A Series Instructions-Parts List Manual

Graco A Series Instructions-Parts List Manual

Air spray gun
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INSTRUCTIONS–PARTS LIST
307–860
Rev. D
Supersedes B
This manual contains IMPORTANT
WARNINGS AND INSTRUCTIONS
READ AND RETAIN FOR REFERENCE
Model AS4000M
MANUAL ELECTROSTATIC METALLIC
AIR SPRAY GUN
100 psi (7 bar) MAXIMUM WORKING PRESSURE
Part Number 221–179 Series A
With 180–739 air cap and 0.047 in. (1.2 mm)
fluid nozzle.
U.S. Patent No. 4,241,880, 4,335,851, and 4,721,255
Other U.S. and Foreign Patents Pending
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
COPYRIGHT 1988 GRACO INC.

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  • Page 1 Part Number 221–179 Series A With 180–739 air cap and 0.047 in. (1.2 mm) fluid nozzle. U.S. Patent No. 4,241,880, 4,335,851, and 4,721,255 Other U.S. and Foreign Patents Pending GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441 COPYRIGHT 1988 GRACO INC.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS Terms ........Parts Drawing .

  • Page 4: Safety Warnings

    SAFETY WARNINGS SERIOUS BODILY INJURY, EXPLOSION, FIRE, OR ELECTRIC SHOCK CAN OCCUR IF THE PRECAUTIONS BELOW ARE NOT FOLLOWED. READ AND UNDERSTAND ALL INSTRUCTION MANUALS, TAGS, AND WARNING LABELS BEFORE OPERATING EQUIPMENT. ELECTROSTATIC EQUIPMENT SHALL ONLY BE USED BY TRAINED, QUALIFIED PERSONNEL WHO SHALL BE FULLY CONVERSANT WITH THE REQUIREMENTS STATED WITHIN THIS INSTRUCTION MANUAL.
  • Page 5 FIRE OR EXPLOSION HAZARD All parts of the electrostatic spray system must be properly grounded to All electrically conductive objects or devices in the spray area, in- reduce the risk of static electricity discharge. Static electricity is created cluding paint containers and wash cans, must be properly by the high velocity flow of fluid through the pump and hose and the spray grounded.

  • Page 6: Typical Installation

    For assistance in designing a system, formed properly. Do not install or service this equip- contact your Graco representative. ment unless you are trained and qualified. Warning Signs...

  • Page 7: Ventilate The Spray Booth

    INSTALLATION Ventilate the Spray Booth 2. Install an air line lubricator (D) as close to the pump (F) as possible. WARNING 3. Install a bleed–type air regulator (E) on the pump and To prevent hazardous concentrations of toxic gun air supply lines to control air pressure to the and/or flammable vapors, spray only in a properly pump and gun.

  • Page 8: Check The Electrical Grounding

    INSTALLATION Check the Electrical Grounding (See Fig 1) WARNING True Earth Ground Ohmmeter Proper electrical grounding of every part of your system is essential. For your safety, read the warning section, FIRE EXPLOSION HAZARD, on page 5. Ground the system as explained there.

  • Page 9: Operation

    OPERATION WARNING Pressure Relief Procedure 3 in. (76 mm) To reduce the risk of serious bodily injury, including Square Cutout splashing in the eyes or on the skin, injury from moving parts or electric shock, always follow this procedure when shutting off the system, when 2 Fingers of Glove Cutoff checking or servicing any part of the spray system,...

  • Page 10: Adjust The Spray Pattern

    OPERATION Adjust the Spray Pattern NOTE: When increasing to a wide, flat pattern, you may have to increase the supply of fluid to the gun to This gun can atomize many fluids with different viscosi- maintain the same amount of coverage over a ties and at various flow rates.

  • Page 11: Maintenance

    MAINTENANCE Daily Care and Cleaning 4. Use the soft bristle brush (77a), supplied, and sol- vent to clean the air cap, fluid nozzle, and front part of For Y our Safety , always follow the Pressure Relief Pro- the gun. cedure on page 9 when shutting off the system, when you stop spraying and before checking, servicing, install- 5.

  • Page 12: Spray Pattern Troubleshooting Chart

    SPRAY PATTERN TROUBLESHOOTING CHART WARNING Installing and servicing this equipment requires access to parts which may cause electric shock or other serious bodily injury if the work is not performed properly. Do not install or service this equipment unless you are trained and qualified.

  • Page 13: Gun Operation Troubleshooting Chart

    GUN OPERATION TROUBLESHOOTING CHART PROBLEM CAUSE SOLUTION Leakage from fluid pack- Loose packing nut (27). Tighten. ing nut. Worn needle packing (6). Replace needle packing. Air leakage from front of Air valve not seating properly. Clean, service. gun. Air stem packing too tight. Loosen packing.

  • Page 14: Electrical Troubleshooting Chart

    ELECTRICAL TROUBLESHOOTING CHART PROBLEM CAUSE SOLUTION Poor wrap–around. Parts poorly grounded. Clean hangers, check for proper ground on conveyer or track. High exhaust velocity. Reduce within code limits. High fluid pressure. Reduce pressure. Fluid viscosity. Check supplier for proper fluid for electrostatic spray.
  • Page 15 ELECTRICAL TROUBLESHOOTING CHART PROBLEM CAUSE SOLUTION Low or no electrostatic Faulty Power Supply. See instruction manual included with Power Supply. wrap. (Spraying voltage light does not come on). Air flow switch is stuck or Replace or repair air flow switch. sluggish.

  • Page 16: Gun Disassembly

    SERVICE Gun Disassembly Electrode Replacement Remove the air cap (17) and fluid nozzle (19) as de- WARNING scribed in the Maintenance Section under Clean the Air Installing and servicing this equipment requires Cap and Fluid Nozzle. access to parts which may cause electric shock or other serious bodily injury if the work is not per- Remove the electrode (56*) with the wrench (77d*) sup- formed properly.

  • Page 17: Barrel Removal

    SERVICE Barrel Removal Fluid Tube Remove the three nuts (81) and screws (80), then re- Screw move the shroud (79). See Fig 6. Adapter Retaining Nut Disconnect the fluid hose nut (67) and collar (68) from the Spacer fitting (39). See Fig 7. Fluid Hose Nut Collar Pull the tube (31) out of the fitting (39).

  • Page 18: Fluid Packing Removal

    SERVICE Fluid Packing Removal Fluid Packing Replacement Remove the electrode resistor as described in Electrode Slide the packing nut (27) onto the fluid needle shaft (55). Replacement. Then slide the insulator (32) onto the needle shaft. The holes in the one end of the insulator (32) must face to- Remove the barrel as described in Barrel Removal.

  • Page 19: Resistor Assembly Replacement

    SERVICE Slide the hook (50) forward and out of the gun channel. Pull the resistor housing (58b) up and forward to remove Retaining Nut it from the gun handle (57) chamber. Remove the spring (11) from the end of the resistor. CAUTION Clean all parts in non–conductive solvent compatible with the fluid being used, such as xylol...

  • Page 20: Fan Air Valve Replacement

    SERVICE Fan Air Valve Replacement Air Valve Replacement Place a wrench on the valve housing (42) flats and Using a screwdriver, remove the retainer (29), spring remove the housing from the handle. See Fig 13. (62), and air valve stem (59) from the gun handle. See Fig 14.

  • Page 21: Resistor Stud Or Contact Replacement

    SERVICE Resistor Stud or Contact Replacement Using the tool (77g*) supplied, reinstall the resistor stud in the front of the gun barrel (36). Tighten until snug. WARNING Reinstall the electrode (56*) as described under Old/New Style Resistor Stud and Electrode Electrode Replacement.
  • Page 22 PARTS DRAWING WARNING Old/New Style Resistor Stud and Electrode To reduce the risk of sparking, which could cause fire or explosion, BE SURE the electrode and stud you install are black. The old style electrode and stud were white. DO NOT mix old style parts with new style parts.
  • Page 23 2. Check the parts list to identify the correct part number; do not use the continuity of the gun, which could cause fire and ex- ref. no. when ordering. plosion and result in property damage and serious 3. Order all parts from your nearest Graco distributor. bodily injury. 6 digit Part...
  • Page 24 ACCESSORIES Accessories must be purchased separately. Use only GENUINE GRACO PARTS AND ACCESSORIES. FILTER (AIR OR PAINT) 202–271 BUNA–N AIR HOSE ASSEMBLIES 750 psi (52 bar) MAXIMUM WORKING PRESSURE 180 psi (13 bar) MAXIMUM WORKING PRESSURE With 60 mesh (250 micron) element, 0.25 in.

  • Page 25: Accessories

    ACCESSORIES Accessories must be purchased separately. Use only GENUINE GRACO PARTS AND ACCESSORIES. REMOTE SWITCH & SIGNAL LIGHT 728–386 PAINT RESISTANCE METER 722–886 Used with 722–860 Paint Probe to measure resistance of paint. Not for use in Hazardous areas. PAINT PROBE 722–860 Used with 722–886 Paint Resistance Meter to measure...
  • Page 26 SERVICE INFORMATION Listed below by the assembly changed are OLD and NEW parts. Assembly Changed Status No. Part No. Name 221–179 280–209 Cover Air Spray 76 180–209 Cover 181–286 Wrench 77d 177–007 Wrench INTERCHANGEABILITY NOTE: NEW parts replace the OLD parts listed directly above them. ACCESSORIES NOTE: Added Gun, Power Supply and Hose Kits 222–425 through 222–429.
  • Page 28 Graco distributor to the original purchaser for use. As purchaser’s sole remedy for breach of this war- ranty, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment proven defective.

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As4000m

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